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Patch series "mm/damon: add sysfs dirs for managing DAMOS filters based on handling layers". DAMOS filters are categorized into two groups based on their handling layers, namely core and operations layers. The categorization affects when each filter is evaluated. Core layer handled filters are evaluated first. The order meant nothing before, but introduction of allow filters changed that. DAMOS sysfs interface provides single directory for filters, namely 'filters'. Users can install any filters in any order there. DAMON will internally categorize those into core and operations layer handled ones, and apply the evaluation order rule. The ordering rule is clearly documented. But the interface could still confuse users since it is allowed to install filters on the directory in mixed ways. Add two sysfs directories for managing filters by handling layers, namely 'core_filters' and 'ops_filters' for filters that handled by core and operations layer, respectively. Those are avoided to be used for installing filters that not handled by the assumed layers. For backward compatibility, keep 'filters' directory with its curernt behavior. Filters installed in the directory will be added to DAMON after those of 'core_filters' and 'ops_filters' directories, with the automatic categorizations. Also recommend users to use the new directories while noticing 'filters' directory could be deprecated in future on the usage documents. Note that new directories provide all features that were provided with 'filters', but just in a more clear way. Deprecating 'filters' in future will hence not make an irreversal feature loss. This patch (of 8): damon_sysfs_scheme_set_filters() is using a hard-coded directory name, "filters". Refactor for general named directories of same files hierarchy, to use from upcoming changes for adding sibling directories having files same to those of "filters", and named as "core_filters" and "ops_filters". [arnd@arndb.deL avoid Wformat-security warning] Link: https://lkml.kernel.org/r/20250310135142.4176976-1-arnd@kernel.org Link: https://lkml.kernel.org/r/20250305222733.59089-1-sj@kernel.org Link: https://lkml.kernel.org/r/20250305222733.59089-2-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
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| net | ||
| rust | ||
| samples | ||
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| security | ||
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| usr | ||
| virt | ||
| .clang-format | ||
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| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
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| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.